The games crashes a lot with me but maybe I spammed too much the button... but, it's a juicy arcade game on game boy ! The progression is pretty interessting with the system of ninja and power, cool !
I just pressing A multiple time seem to crash the game when launching it (so, after selecting the character) and when exiting it (the menu appears but the crash log did too)
I can't reproduce it consistently, so it may vary from PC to PC, but I think it's related to room changes in GMS 2.3. I'll have to take a look into that :(
